公开(公告)号：US09816157B2

公开(公告)日：2017-11-14

申请号：US14152787

申请日：2014-01-10

Applicant: University of Utah Research Foundation

Inventor： Zhigang Zak Fang ,  Pei Sun ,  James Paramore ,  Hongtao Wang ,  Mark Koopman ,  Lu Yang

IPC: C22C1/04 ,  B22F3/10

CPC classification number: C22C1/0458 ,  B22F3/101 ,  B22F2999/00 ,  B22F2201/013 ,  B22F2201/20

Abstract: A process includes sintering hydrogenated titanium or titanium hydride (TiH2) and/or Ti metal in a dynamically controlled hydrogen atmosphere with hydrogen partial pressure greater than 0.01 atmosphere and at elevated temperature, to form a sintered titanium material; equilibrate the sintered material at an equilibration temperature below the sintering temperature and above the phase transformations including eutectoid decomposition temperature for an equilibration time sufficient for the hydrogen within the sample to reach equilibrium and homogenize the sintered titanium material; holding the sintered titanium material at a hold temperature below the temperature of sintering and a hold time sufficient for phase transformations including eutectoid decomposition of the sintered titanium material; and heating the sintered titanium material under vacuum, inert atmosphere, or a combination of both at a hold temperature which is less than that of the sintering temperature, to form titanium metal, or a titanium metal alloy with fine or ultrafine grain sizes; where the dynamically controlled hydrogen atmosphere varies as a function of time and temperature throughout the thermal cycle and includes hydrogen during the sintering and phase transformations including eutectoid decomposition steps.

公开(公告)号：US20140255240A1

公开(公告)日：2014-09-11

申请号：US14152787

申请日：2014-01-10

Applicant: University of Utah Research Foundation

Inventor： Zhigang Zak Fang ,  Pei Sun ,  James Paramore ,  Hongtao Wang ,  Mark Koopman ,  Lu Yang

IPC: B22F3/24

CPC classification number: C22C1/0458 ,  B22F3/101 ,  B22F2999/00 ,  B22F2201/013 ,  B22F2201/20

Abstract: A process includes sintering hydrogenated titanium or titanium hydride (TiH2) and/or Ti metal in a dynamically controlled hydrogen atmosphere with hydrogen partial pressure greater than 0.01 atmosphere and at elevated temperature, to form a sintered titanium material; equilibrate the sintered material at an equilibration temperature below the sintering temperature and above the phase transformations including eutectoid decomposition temperature for an equilibration time sufficient for the hydrogen within the sample to reach equilibrium and homogenize the sintered titanium material; holding the sintered titanium material at a hold temperature below the temperature of sintering and a hold time sufficient for phase transformations including eutectoid decomposition of the sintered titanium material; and heating the sintered titanium material under vacuum, inert atmosphere, or a combination of both at a hold temperature which is less than that of the sintering temperature, to form titanium metal, or a titanium metal alloy with fine or ultrafine grain sizes; where the dynamically controlled hydrogen atmosphere varies as a function of time and temperature throughout the thermal cycle and includes hydrogen during the sintering and phase transformations including eutectoid decomposition steps.

Abstract translation: 一种方法包括在氢分压大于0.01大气压和升高的温度下在动态控制的氢气气氛中烧结氢化钛或氢化钛（TiH 2）和/或Ti金属，以形成烧结的钛材料; 在低于烧结温度的平衡温度和高于包括共析分解温度的相变的平衡温度下平衡烧结材料，以获得足以使样品内的氢达到平衡并使烧结的钛材料均匀化的平衡时间; 将烧结的钛材料保持在低于烧结温度的保持温度和足以进行相变的保持时间，包括烧结的钛材料的共析分解; 在低于烧结温度的保持温度下在真空，惰性气氛或二者的组合下加热烧结的钛材料，以形成钛金属或具有精细或超细晶粒尺寸的钛金属合金; 其中动态控制的氢气氛在整个热循环中随着时间和温度的变化而变化，并且在包括共析分解步骤的烧结和相变过程中包括氢。